ASIdiSPIM: changes to slice timing calculations; fixes problem seen with Flash4 due to not accounting for delay between trigger and exposure start, also shaves 0.25ms from minimum slice period in easy timing mode

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14766 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM: move per-acquisition of z-step_um metadata to where rest of acquisition metadata is set; was before acquisition initialization before (to work around a now resolved bug?) but it wasn't showing up in the metadata and now it is

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14767 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM: remove debugging code tidbit accidentally included in last checkin

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14768 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM: added setting to bypass missing scanner warning useful for debug; can collect fake dataset with only DemoCam, no Tiger controller needed

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14769 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM: eliminated missing property warnings if "ignore missing scanner" is checked

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14770 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd